OK.... the time has come... i have done everything i had set out to do in freshwater... my next step is to make the journey into saltwater... but here's a few questions ... i currently am using pool filter sand as my substrate.... do i need to change this? Or is there a way to use it... i have a protein skims already and 2 mag12 return pumps in my sump... what else is necessary for a FOWLR tank... and simply just some stocking ideas... i no longer care for overly aggressive fish... i want to catch my 2 year old's eyes and make her say look at those colors daddy... so give me some ideas guys... fire away... OH AND TANK IS 4'x3'x2' with over flow and marine land double bright LED...